Latest Contributions by LarsHuttar

‎05-20-2014

I called ESRI tech support, and the knowledgeable analyst helped me discover the problem. the API documentation I was using was the variant for AMD AMD is only available for v3.4+, or thereabouts. Not in v3.0. for non-AMD code, you use esri.graphicsExtent(). I tried using esri.graphicsExtent(), and it worked! So ... what was my problem originally, that started all this? I really don't know why esri.graphicsExtent() didn't work before. Possibly because it was being used before the scripts had finished loading??

‎05-19-2014

Hello, I'd been using esri.graphicsExtent() back in API v1.5 or so. I'm now migrating to JS API v3 (with ArcGIS 10.1 on the server side). My code that uses esri.graphicsExtent() no longer works, but I see from https://developers.arcgis.com/javascript/jsapi/esri.graphicsutils-amd.html that the graphicsExtent() function is now under the esri/graphicsUtils namespace. The example there shows the use of require([ "esri/graphicsUtils", ... ], function(graphicsUtils, ... ) { var myFeatureExtent = graphicsUtils.graphicsExtent(myFeatureSet.features); ... }); But when I try following that pattern, I get the error NetworkError: 404 Not Found - https://js.arcgis.com/3.0/js/dojo/esri.graphicsUtils.js in my javascript console. I've also tried dojo.require("esri.graphicsUtils"); , but it doesn't work either. My JS API script loading tag looks like this: <script type="text/javascript" src="https://js.arcgis.com/3.0/"></script> What do I need to do to successfully load the graphicsUtils namespace? Thanks for any suggestions. P.S. my "require()" code is inside a function that's not called until a particular UI feature is used. Could it be important that the require() code be outside of any functions, at the outer script level? Currently, at that level I have a series of dojo.require() statements like dojo.require("esri.tasks.query"); dojo.require("esri.tasks.identify"); Adding dojo.require("esri.graphicsUtils"); there doesn't work. Nor does dojo.require("esri/graphicsUtils"); Either way, I get a 404 Not Found on https://js.arcgis.com/3.0/js/esri/graphicsUtils.js P.P.S. Did something about this namespace change between 3.0 and 3.9? The viewshed sample (https://developers.arcgis.com/javascript/jssamples/gp_viewshed.html) seems to use this module successfully.

‎08-08-2013

+1 for being able to preserve symbology, joins/relates, etc. as much as possible when changing data sources. So often, the new data source would work just fine with the existing symbology and joins ... it's a real hassle to have to recreate it all.

‎02-01-2013

You probably won't like this answer but this is all so much easier at 10.1. At 10.1 sp1 we made a change so the NADCON transformation will no longer be added to the map by default, so it won't show up unless the transformation was actually set by the user. Hi Chris, thanks for the reply. That does clarify for me why I'm getting the NADCON transformation, when it's not in the data frame properties. For now my workaround is to (1) try projecting using the transformation returned by dataframe.transformations[0]; and (2) if it didn't work, and the transformation is the NAD one, retry projecting without the transformation. I will look forward to these improvements in 10.1... we should be upgrading soon.

‎01-24-2013

Hi all, I have a script that opens a user-specified MXD and processes user-specified layers in it. Part of the processing involves projecting the data from whatever GCS it's in, to whatever PCS the data frame has in its spatial reference. Sometimes, the input GCS and the output PCS are in the same datum (e.g. WGS_1984), and so I don't need to supply a geographic transformation to Project_management(). Other times, they are not in the same datum; e.g. the data frame coordinate system might be Europe_Lambert_Conformal_Conic, which uses the datum ED_1950. If I don't supply the right geographic transformation (or lack thereof), the Project tool fails. How do I know what transformation to use? In the case where the datums are different, I can require that the data frame in the MXD file have a transformation method specified in its properties, e.g. ED_1950_To_WGS_1984_10. If that was the end of the story, my job would be simple: if the data frame has a transformation method in its properties, pass that to Project_management(), otherwise omit that parameter. The script would just look at the value of dataFrame.geographicTransformations. The problem is that on some machines, when I ask for mydataframe.geographicTransformations, I get a spurious value of "NAD_1927_To_NAD_1983_NADCON". So if the data frame has no transformation methods specified in its properties dialog, dataFrame.geographicTransformations returns ["NAD_1927_To_NAD_1983_NADCON"]. Which causes Project_management() to fail, if that transformation doesn't apply to the GCS and PCS actually being used. For example, when the data's GCS is GCS_WGS_1984, and the data frame's PCS is Asia_Lambert_Conformal_Conic, no geo transformation is needed (both have datum D_WGS_1984), and none is specified. So if I pass dataFrame.geographicTransformations[0] to Project_management() as the geographic transformation parameter, I will cause it to fail. If the data frame does have a transformation method specified in its properties dialog, then (on these same machines) dataFrame.geographicTransformations returns a list with "NAD_1927_To_NAD_1983_NADCON" as the first element, followed by the one specified in the properties dialogue. Again, this is on some machines. On others, the spurious "NAD_1927_To_NAD_1983_NADCON" doesn't appear, so I can rely on dataFrame.geographicTransformations to be set, or not, as appropriate. So my question is, where is this spurious transformation coming from, and how do I get rid of it, so that if I don't need a transformation, I can avoid passing a bad one to Project_management()? There's nothing in the Environment Settings under Output Coordinates / Geographic Transformations. Or, if I can't get rid of it ... maybe I can detect when the data's GCS and the data frame's PCS have the same datum, so I don't need a geographic transformation. In that case I would just not pass any such parameter to Project_management(). The trouble with that approach is, I don't know how to get the datum, or the GCS, of a PCS spatial reference. I can look at dataframe.spatialReference.PCSCode, but spatialReference.GCSCode, GCSname, datumCode and datumName are blank (see http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/SpatialReference/000v000000p6000000/ - these properties are only available with a GCS). I know that ArcGIS desktop knows the GCS being used by the data frame, because when I open data frame properties, the Coordinate System tab tells me not only the PCS but also the GCS (including datum). But it's not available thru dataframe.spatialReference, that I can tell. So, if someone could tell me how to get rid of the uninvited NAD geographic transformation (preferred); and/or how to determine the GCS or datum of a PCS (can I look it up in some standard place?) I would be very appreciative. I'm using ArcGIS Desktop 10.0 by the way. Thanks, Lars

‎01-23-2013

I personally won't be migrating to ArcGIS.com until they provide a "Scripts and Tools" link so you can find the new stuff quickly instead of "searching" for them. Has this idea been put on the Ideas forum, and if so can someone provide a link? So we can all vote it up?

‎01-23-2013

We have a bug where any arcpy.mapping Export function that writes a world file or geotiff tags results in distorted images when brought back into ArcMap. This applies to data frame export scenarios only. This is most likely the issue you are hitting. For your records, the tracking number is NIM070025. We have already fixed it and the plan (subject to change) is to include it the next service pack/release. The workaround is as follows: In the arcpy.mapping.ExportToPNG function, specify a resolution parameter and match the df_output_height and df_output_width parameters with the height and width auto calculated in the ArcMap data view user interface at File > Export Map dialog (Save as type: PNG) for the given resolution. For example: arcpy.mapping.ExportToPNG(mxd, 'foo.png', df, 2122, 1553, 300, world_file=True) In the code sample above, your heights and widths may be different based on screen resolution, so make sure you check in the user interface for acceptable values. Tip: in the dialog, you can change the resolution and get acceptable widths and heights that will work in the ExportToPNG function. Jeff, thanks for this helpful answer. We're not bringing images back into ArcMap, so I'm not sure that this bug is related to the problem we were seeing. However, I'm happy to report that our problem has been resolved. The problem in our case apparently was not with the image exported by ExportToPNG(), but with the HTML coordinates. We had been exporting those with an older, VBA script that (if I understand correctly) didn't properly project the coordinates before writing them out. Our newer, Python version of the script uses Project_management() before exporting the coordinates, and those coordinates do align properly with the image coming of ExportToPNG(). So my original question was inaccurate... At the time, I thought that our newer, Python script had the same problem, but it turned out not to be the case.

‎01-23-2013

Hi, We're using ExportToPNG() to export an image from a data frame, but we're also separately and "manually" writing out coordinates to HTML image maps. (By "manually", I mean we're not using a builtin package tool such as "ExportToHTMLIMageMap().") Our problem is that the two don't align; the projection is apparently different. E.g. North America is "taller" (more stretched) in the exported HTML coordinates. Here is a screenshot in browser; the black outline shows the HTML image map coordinates: [ATTACH=CONFIG]20995[/ATTACH] When we export the coordinates to HTML, we're doing an explicit projection (Project_management()), specifying the spatial reference of the data frame (df.spatialReference). But when we export the image using ExportToPNG(), there seems to be no way to specify a projection or spatial reference. Does anybody know how ExportToPNG() decides what projection to use, or how we can influence it? In ExportToLayoutGeoTIFF() you can supply a data frame for the spatial reference, but not in ExportToPNG(). Ideas we have currently... Set it in the environment, e.g.: arcpy.env.outputCoordinateSystem = df.spatialReference Tell ExportToPNG() to output a georeferenced world file, then try to examine the world file to see what "pixel scale information and real-world coordinate information" it contains (how do we examine it?) Before ExportToPNG(), do an explicit Project_management() with the data (as we do before the HTML coordinate export), allowing us to specify the spatial reference. Repoint layers that use this data to use the new, projected data. I believe I was told that data frames (data view) show data in geographic coordinates, not projected coordinates, so I don't know if this would have any effect, or is even coherent. Any suggestions would be appreciated.

‎02-11-2011

@huttarl I am having the same issue as setExtent not working and i tried converting the string to float as you mentioned but no luck.What i am actually trying is when they click save ,it should refresh the map with same location.Please see the attached code. I am also thinking of version of the script. Thanks, Vani, what actually is happening when they click save? nothing? Actually I don't see a save button in your code. Do you mean the Refresh asp:button? Have you tried checking the values of xmin etc. after these statements: newExtent.xmin =parseFloat(coordinate[1]); newExtent.ymin = parseFloat(coordinate[3]); ... e.g. using an alert, or Firebug console, or something? I'm curious why you use coordinate subscripts 1,3,5,7 instead of 1,2,3,4.

‎02-07-2011

Ryan; for your second question, on image server side, watermark might be an option. How would you accomplish that? Is there a watermark setting you can turn on? I'm actually more interested in watermarking an ArcGIS Server tiled map service rather than an image server service, so hoping you'll have an answer that applies to the former as well. Lars

‎01-26-2011

Hello, I'm using arcpy in ArcGIS 10 to get a listing of all fields in datasources used by an MXD. This works partially, but in some cases I get unqualified field names. The piece of code I'm using to get field names for each layer is: for field in arcpy.ListFields(lyr.name): print " field:", field.name‍‍ This normally shows the fully qualified field name, but in some cases, especially when I have joins to another database (non-GDB), the field names are unqualified. At that point there seems to be no way to discover programmatically what table they belong to. The forum topic Is there a way to Remove All Joins with Python? shows how to recover the names of tables, including joined tables, from ParseFieldName(). But this requires that the field name be qualified in the first place. In ArcMap, when I look at the Fields tab of the layer properties, these particular fields have unqualified names here as well (but other fields have qualified names). So there's something deeper here than just the arcpy API hiding the qualified names. In order to see the name of the joined table at all, I have to go to the Joins & Relates tab, and there I can see it. But I don't think there's a way to find this join information via arcpy; and even if I could, I would still need to know which fields came from that join. (Some layers have more than one join.) Is there any way in Python to find out what table these fields come from, when their names are unqualified? If it helps, I'm using ArcSDE with SQL Server 2005. Thanks for any help.

‎10-01-2010

Hi all, We are using ArcGIS Server 9.3.1, Java, and ArcSDE with SQL Server 2005 sp2. It would be very useful for us to be able to monitor our data periodically for defects, with a query such as select * from sdeDLM.SDE.Lang_Polygons where ISO_LANGUAGE_CODE_ID <> LEFT(ID , 3) In ArcMap, I can do that query using Select by Attributes. I enter the above where clause and click 'Verify', and the expression is verified successfully. But in order to monitor the data we need to use the REST API. We can successfully do REST queries with a where clause such as ISO_LANGUAGE_CODE_ID IS NULL That works just fine. The URL is: http://ourServer:8399/arcgis/rest/services/DLM21_query/MapServer/2/query?text=&geometry=&geometryType=esriGeometryEnvelope&inSR=&spatialRel=esriSpatialRelIntersects&where=ISO_LANGUAGE_CODE_ID+is+NULL&returnGeometry=false&outSR=&outFields=&f=html But when I try a REST query with a where clause like ISO_LANGUAGE_CODE_ID <> LEFT(ID , 3) the REST API returns the message: Unable to perform query. Please check your parameters As best I can tell, it's the LEFT() function that makes the difference. I have been able to successfully use where clauses with everything else in them, including '<>'. The REST API docs (http://resources.esri.com/help/9.3/arcgisserver/apis/rest/query.html) say that "Any legal SQL where clause operating on the fields in the layer is allowed." Is there a way to get the REST API to accept a where clause using Left()? Or a way to find out why it's not working? I tried browsing the latest logs in C:\Program Files\ArcGIS\server\user\log. The file Server-20100929-143218.dat shows the following output from the time when the query failed: String request received. Request size is 2629 characters. QueryFeatureData2 has started. Preparation for method: QueryFeatureData2 has started. Preparation for method: QueryFeatureData2 has completed. Query Operation for method: QueryFeatureData2 on layer 'Language Polygons' has started. GeoDatabase Error :An invalid SQL statement was used. QueryFeatureData2 has completed. Method failed.HRESULT = 0x80040207 : This is a FACILITY_ITF error that is specific to the interface that returned this error. See the documentation of the interface that returned this error for information about this HRESULT. ERROR INFO = An invalid SQL statement was used. But clearly the WHERE clause has been tested as valid elsewhere. And why would some of my WHERE clauses be accepted as valid, but not the one with LEFT() in it? Thanks for any help, Lars

‎09-30-2010

You might also try PushToTest TestMaker (open source). It's not specifically aimed at GIS apps, but it IS specifically aimed at load test simulation, and is pretty good at simulating user scenarios, across multiple test nodes.

‎07-22-2010

Derek, Thanks for your reply. That does help me understand why I'm not finding the menu item. SQL Server Express (aka. Personal or Workgroup ArcSDE geodatabases, also collectively referred to as "Database Servers") OK. I've come across this very counterintuitive ArcGIS terminology before... SQL Server 2005 is not a "database server" but SQL Server Express is... Very misleading. I really wish documentation would say "Personal or Workgroup database server" if that's what they mean. It's like deciding that in my world, "computer" is going to mean "Mac" and I'm going to expect you to know that in every document I write. Everywhere else that I know of, "database server" includes SQL Server non-Express, and indeed a "server" is *more* likely to mean a non-Express db instance, in contrast to a "desktop" db instance as SQL Server Express usually is. I understand that terminology is sometimes established for historical reasons that are no longer applicable, or because of usage in a particular industry niche that stands in contrast to broader usage. But this one is a particularly difficult semantic distinction to discover and maintain in the light of what these words mean in the broader IT industry. I guess I will put a post-it note on my monitor: "In ArcGIS, database server = SQL Express" 😛 I had checked dbserver.pdf to verify that it applied to ArcSDE GDB's in general, not just SQL Server Express, and indeed early in the document ("How is ArcSDE technology included in ArcGIS?") it specifically talks about enterprise DBMS including SQL Server, and does not exclude that as a topic of the document. The document does not say that "database server" = SQL Express. If you happen to read the section "How to install SQL Server Express and enable geodatabase storage" (which I had no reason to do based on the heading), it says "... the SQL Server Express installation. This instance is referred to as a database server in ArcGIS Desktop," but it does not say that *only* a SQL Express instance is a "database server", nor that this meaning applies in ArcGIS Server. Chapter 6 talks about maintaining a gdb, and compressing a gdb, then switches to "Compressing a geodatabase on an ArcSDE database server" without saying anything to contrast this with an enterprise gdb. Even though I had an inkling that "database server" was at least sometimes used by ESRI to mean SQL Server Express, the document failed to confirm that it was making that distinction. I'm not trying to shoot the messenger... you are probably not the one who decided on this terminology. But maybe if I express my frustration to enough messengers, ESRI will realize how confusing the usage is, and clarify documentation by making references to Personal and Workgroup database servers more explicit. Based on what you've described, it sounds like you're working with an Enterprise ArcSDE geodatabase implemented on SQL Server 2005. In which case, some administration is performed within ArcCatalog (e.g., the Analyze option for feature datasets, stand-alone feature classes, and tables), and some is performed within the DBMS management tools. Connections in ArcCatalog to enterprise ArcSDE geodatabases do not have an "Administration" submenu option - so what you are seeing is expected. Hope this helps, I found the PDF I referred to above as a result of searching for ESRI documentation on how to perform administration on ArcSDE geodatabases on SQL Server 2005. Can you point me to more detailed information that pertains to enterprise gdb's? We have a query in an ArcGIS map service in production that used to be very fast, but is now unacceptably slow (15-30 seconds). I've tried Analyzing the FDSs/FCs/tables, but the query is still slow. I see there is a course on enterprise db tuning, e.g. for SQL Server, for several hundred dollars... is that my only recourse? On the non-ArcSDE tables we use, I can use SQL Server 2005's Database Engine Tuning Advisor; but in the case of ArcSDE tables, we have multiple interrelated tables (aNN, dNN, etc.) that would all affect the query. I hesitate to use DBMS tools that are ignorant of the interrelatedness of these tables, if there are ArcGIS tools available for this purpose. But maybe there aren't? Thanks for any further pointers on how to compress or update statistics on an enterprise ArcSDE GDB. Lars

‎07-21-2010

Hi... Reading documentation like http://resources.esri.com/help/9.3/geodatabase/pdf/dbserver.pdf in order to find out how to update statistics or compress a gdb... It says things like: 1. In the Catalog tree, connect to the database server that contains the geodatabase you want to compress. 2. Right-click the geodatabase you want to compress. 3. Choose Administration from the geodatabase context menu and click Compress Database. I do 1 and 2, but the geodatabase context menu has no "Administration" submenu. How can I find it? I am using ArcEditor. I have connected to the gdb as an administrator (using SQL Server authentication), i.e. as a user whose login has the db owner role on the gdb. We're using ArcGIS Server 9.3.1 and SQL Server 2005. The PDF mentioned above says, "You must be an ArcSDE database server administrator or a geodatabase administrator to compress a geodatabase. The Compress Database function will be deactivated if you are not in one of these two roles." I believe I am the gdb administrator; in any case, there is not even an Administration submenu, let alone a grayed-out "Compress Database" submenu item. Can someone help me find this submenu? Interestingly enough, if I right-click on one of the Feature Data Sets in the gdb I'm looking at, I do get a menu item "Analyze", which is similar to what I want to do; and I can run the Analyze operation without errors. Which suggests to me that I do have administrator privilege. But I can't find any Administration submenu. Thanks for any suggestions...

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My Ideas

Latest Contributions by LarsHuttar

Re: how to require graphicsUtils in v3

how to require graphicsUtils in v3

Re: Advanced Data Source Management

Re: getting the specified geographic transformation, or at least the GCS, of a data f

getting the specified geographic transformation, or at least the GCS, of a data frame

Re: The old ArcScripts Forum

Re: specify spatial reference for ExportToPNG

specify spatial reference for ExportToPNG

Re: setExtent() doesn't take effect

Re: Legend and ArcGISTiledMapServiceLayer

getting qualified field names, even of joined fields?

can't use Left() function in query?

Re: ArcGIS Server automated load test simulation tool?

Re: can't find Administration / Maintenance on geodatabase context menu

can't find Administration / Maintenance on geodatabase context menu

Re: how to require graphicsUtils in v3